Verituner

[David Bauguess]

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This is in response to several points from the recent Verituner discussion:

1. As to whether or not hardware is a factor in the Verituner=B9s performance=
,
the answer is yes. The Verituner 100 uses a dedicated Digital Signal
Processing chip that, for one thing, enables it to simultaneously measure u=
p
to eight partials per note. This is done in the background as one tunes.

2. The partials of 76 notes are measured, a total of  464 partials. As Ron
wrote, there is no point in measuring partials in the top octave, although
the fundamental of those pitches is measured. With this comprehensive
picture of a piano=B9s inharmonicity, the Verituner can calculate tuning
targets that consider anomalies in the scale. The result is a more highly
customized stretch for the individual piano. This accounts for the positive
reports of Verituner tunings, notably on small and poorly scaled pianos.

3. We probably haven=B9t heard the final word yet on the optimal tuning
sequence, but in general the Verituner can make the optimal use of the
information it is gathering (as the piano is being tuned) if A4 is tuned
first and the tuning then begins somewhere in the center of the piano and
proceeds upward by step, and then from the center down. The current
recommendation is, after tuning A4, tune A3 to C8, then G# to A0. Dave
Carpenter is conducting an analysis that will lead to a definitive
recommendation.=20

4. It is important to understand that tuning sequence with the Verituner is
only a concern with with the first tuning of a piano with the Verituner.
Once the =B3complete=B2 inharmonicity information is collected, it is used for
subsequent tunings, as long as the saved file is used. At that point
sequence does not matter to the Verituner.
=20
5. The Verituner=B9s Measured Tuning mode is used to save an aural tuning. A
single partial of each note, which can be selected by the user, is measured
and stored.

6. A new feature in the latest firmware release (a free download that will
be available today) is the ability to alter calculated tuning targets and
store them in the tuning record. The real power of this is that the altered
targets are used in all recalculations of the tuning.

7. Enhancement of the pitch raising mode is in the newest release and shoul=
d
result in significantly improved performance. The markers that indicate the
starting pitch and the overpull target now lock immediately and stay locked=
,
although they can easily be erased by the user and reset. Overpull
percentages for three sections of the piano can now be specified by the
user. Furthermore, the user can quickly tell the Verituner where the
sections begin, and the Verituner automatically switches the percentages as
one tunes. It also automatically transitions the percentages from the tenor
into beginning of the treble and tapers it at the top.

8. For more information about the Verituner=B9s operation and how it
calculates tunings, you can download the complete User Guide (in PDF format=
)
at http://www.veritune.com/downloads.html   An updated version of the Guide
will be available in a few days.

David Bauguess 

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